Tumor restriction by type I collagen opposes tumor-promoting effects of cancer-associated fibroblasts

结缔组织增生 癌症研究 转移 肝星状细胞 癌症 肿瘤进展 免疫系统 肿瘤发生 生物 胰腺癌 医学 肿瘤微环境 化学 免疫学 内科学 肿瘤细胞 内分泌学
作者
Sonakshi Bhattacharjee,Florian Hamberger,Aashreya Ravichandra,Max J. Miller,Ajay Nair,Silvia Affò,Aveline Filliol,LiKang Chin,Thomas Savage,Deqi Yin,Naita M. Wirsik,Adam Mehal,Nicholas Arpaia,Ekihiro Seki,Matthias Mack,Di Zhu,Peter A. Sims,Raghu Kalluri,Ben Z. Stanger,Kenneth P. Olive,Thomas Schmidt,Rebecca G. Wells,Ingmar Mederacke,Robert F. Schwabe
出处
期刊:Journal of Clinical Investigation [American Society for Clinical Investigation]
卷期号:131 (11) 被引量:236
标识
DOI:10.1172/jci146987
摘要

Cancer-associated fibroblasts (CAF) may exert tumor-promoting and tumor-suppressive functions, but the mechanisms underlying these opposing effects remain elusive. Here, we sought to understand these potentially opposing functions by interrogating functional relationships among CAF subtypes, their mediators, desmoplasia, and tumor growth in a wide range of tumor types metastasizing to the liver, the most common organ site for metastasis. Depletion of hepatic stellate cells (HSC), which represented the main source of CAF in mice and patients in our study, or depletion of all CAF decreased tumor growth and mortality in desmoplastic colorectal and pancreatic metastasis but not in nondesmoplastic metastatic tumors. Single-cell RNA-Seq in conjunction with CellPhoneDB ligand-receptor analysis, as well as studies in immune cell–depleted and HSC-selective knockout mice, uncovered direct CAF-tumor interactions as a tumor-promoting mechanism, mediated by myofibroblastic CAF–secreted (myCAF-secreted) hyaluronan and inflammatory CAF–secreted (iCAF-secreted) HGF. These effects were opposed by myCAF-expressed type I collagen, which suppressed tumor growth by mechanically restraining tumor spread, overriding its own stiffness-induced mechanosignals. In summary, mechanical restriction by type I collagen opposes the overall tumor-promoting effects of CAF, thus providing a mechanistic explanation for their dual functions in cancer. Therapeutic targeting of tumor-promoting CAF mediators while preserving type I collagen may convert CAF from tumor promoting to tumor restricting.
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